Two environmental groups with long histories in agricultural issues are joining their lobbying and election-funding efforts to create what they say will be "a team that can target exactly the right pressure points to grow the environmental majority across party lines."

The League of Conservation Voters (LCV) and the Natural Resources Defense Council Action Fund are calling the alliance LeadingGreen.

They say the effort "will unite top donors and influencers at the intersection of policy and politics to maximize" political leverage on climate change.

The alliance, organizers say, will also expand the LCV Action Fund's existing GiveGreen program with a goal of raising or contributing $5 million in 2014 for political candidates with strong environmental credentials.